This
[CRAFT RESIN Epoxy Resin Kit -... https://www.amazon.com/dp/B07YCVVYFK?ref=ppx_pop_mob_ap_share](CRAFTRESINEpoxyResinKit-...https://www.amazon.com/dp/B07YCVVYFK?ref=ppx_pop_mob_ap_share)
Humidity shouldn’t be a problem, UV is the problem with using resin outside, I’ve yet to try any outdoors but I’m about to make a table that’s going outside. I just searched for UV stabile resin on Amazon.